Evaluation of Algae-Based Biodiesel Production Topologies via Inherent Safety Index (ISI)

Abstract

Increasing energy needs have led to soaring fossil fuel consumption, which has caused several environmental problems. These environmental aspects along with the energy demand have motivated the search for new energy systems. In this context, biofuels such as biodiesel have been developing into a substitute for conventional fuels. Microalgae are considered a promising option for biodiesel production due to their high lipid content. Therefore, it is important to analyze the technical aspects of the biodiesel production system. In this work, the inherent safety analysis of three emerging topologies for biodiesel production from microalgae was performed using the inherent safety index (ISI) methodology. Selected topologies include biodiesel production via lipid extraction and transesterification, in-situ transesterification, and hydrothermal liquefaction (HTL). The results revealed that the processes are inherently unsafe achieving total inherent safety index scores of 30, 29, and 36. The main risks in the cases were associated with the chemical safety index. Operating conditions represented no risk for topologies 1 and 2, while for topology 3 pressure and temperature were identified as critical variables. In general, topology 2 showed better performance from a safety perspective.

Inherent Safety Analysis and Sustainability Evaluation of a Vaccine Production Topology in North-East Colombia

“…PEI output and PEI generated are considered in this methodology. PEI output can be defined as a measurement of the ability of the process to obtain a product with the minimum discharge of PEI [25] and can be estimated through Equation (7).…”

“…Safety analysis is relevant for designing more reliable processes [7]. The safety analysis allows for the identification of critical aspects to incorporate actions that mitigate the risks.…”